| Mineral: |
Goethite |
| Reference: |
BM81 |
| SCM Type: |
TL - Triple Layer
(C1: 1.4 F/m2, C2: 0.2 F/m2) |
| Ionic Strength: |
0.0 mol/L of
NaCl
|
| Site Type: |
»Fe-OH |
| PZC: |
7.5 |
| pK1: |
5.57 |
pK1°I=0 (Conversion to I = 0): |
5.57 |
pK12.31 nm−2 (normalized): |
5.61 |
| pK2: |
9.52 |
pK2°I=0 (Conversion to I = 0): |
9.52 |
pK22.31 nm−2 (normalized): |
9.48 |
| Site Density in nm-2: |
2.5594 |
| Original Site Density: |
4.25 µmol / m² surface
|
| Solid/Liquid Ratio in g/L: |
7.48 |
| pH Range: |
5-9 |
| Temperature in K: |
|
| Method for Site Density: |
Potentiometric Titration |
| Method for Protolysis: | Potentiometric Titration |
| Fit Method: | graphic extrapolation |
| Comment: |
double extrapolation technique [DJL78] for determination of pK: plotting the ionization term for 0.7, 0.1, and 0.01 M NaCl resp.KCl and extrapolation to IS=0, for pH>PZC best fit for C1=1.4; for pH
|
| |
